| Abbreviation | Definition |
|---|---|
| NATF | National Air Transportation Foundation |
| NATF | National Apprenticeship Training Foundation |
| NATIF | National Technology Innovation Foundation |
| NAWF | North America Wales Foundation |
| NBF | National Blood Foundation |
| NBHF | Nasser Bin Hamad Foundation |
| NBHF | Norman Borlaug Heritage Foundation |
| NBIF | New Brunswick Innovation Foundation |
| NBRF | National Biomedical Research Foundation |
| NBRF | National Borzoi Rescue Foundation |
| NBSF | National Book Store Foundation |
| NBSF | New Beginnings Schools Foundation |
| NCAF | New Canaan Athletic Foundation |
| NCCF | National Canine Cancer Foundation National Canine Cancer Foundation |
| NCDF | Nevis Cultural Development Foundation |
| NCF | Naga College Foundation |
| NCF | Narramore Christian Foundation |
| NCF | Natca Charitable Foundation |
| NCF | National CFIDS Foundation's |
| NCF | National Christian Foundation |